For the control of Oodinium in a saltwater aquarium Exodin is an effective and reliable treatment for the Oodinium parasite in marine aquaria. Exodin is not harmful to invertebrates or marine algae and the disinfecting quality of Exodin helps to prevent fish from contracting secondary infections. During treatment, no turbidity or water discoloration occurs. 100ml for 250 liters (3.3oz for 65 gallons) 500ml for 1,250 liters (17oz for 325 gallons)